光学学报, 2018, 38 (9): 0934001, 网络出版: 2019-05-09
基于Angel型龙虾眼X射线透镜的数值模拟 下载: 1060次
Numerical Simulation of Angel Lobster Eye X-ray Micro Pore Optic Lens
X射线光学 Angel型龙虾眼 X射线全反射 传输效率 聚焦成像 X-ray optics Angel lobster eye X-ray reflection transmission efficiency focusing and imaging
摘要
为了研究Angel型龙虾眼X射线透镜的聚焦成像特性,基于X射线全反射原理和旋转坐标系方法,建立X射线在方孔内壁的数值模型。通过求解X射线在方孔内壁的交点,得到所有光线的传输路径。为了验证模型的准确性,对透镜的焦距和传输效率分别进行实验测试和模拟。在365 mm焦距处,参与反射的X射线被会聚为十字线,中心焦斑光强最大,与模拟所得结果相符。在能量4.5 keV下,透镜镀金属Ir膜前、后的传输效率分别为1.23%和9.18%,模拟结果的传输效率分别为1.44%和10.14%。结果表明:构建的数值模型是合理的,可为龙虾眼透镜的研制提供理论基础。
Abstract
In order to study the focusing and imaging performance of Angel lobster eye X-ray micro pore optic lens, the numerical model of the X-ray in the square channel is established based on X-ray reflection principle and rotating coordinate system. By solving the intersection, the transmission path of all the rays is obtained. In order to verify the accuracy of the model, the focal length and transmission efficiency of the lens are both simulated and tested. At the focal length of 365 mm, the reflected X-rays are focused into cross line, and the center focal spot intensity is the largest, which is consistent with the simulation results. As for the transmission efficiency of the lens before and after coating Ir, the simulation results are 1.23% and 9.18%, respectively, at the energy of 4.5 keV. Accordingly, the experimental results are 1.44% and 10.14%, respectively, which is consistent with the above data. The results show that the numerical model is reasonable and provides the theoretical and simulation basis for the fabrication of the lens.
金戈, 黎龙辉, 张臣, 杨雪, 张诗鲲, 张智勇, 毛汉祺, 徐昭, 张振, 姜博文. 基于Angel型龙虾眼X射线透镜的数值模拟[J]. 光学学报, 2018, 38(9): 0934001. Ge Jin, Longhui Li, Chen Zhang, Xue Yang, Shikun Zhang, Zhiyong Zhang, Hanqi Mao, Zhao Xu, Zhen Zhang, Bowen Jiang. Numerical Simulation of Angel Lobster Eye X-ray Micro Pore Optic Lens[J]. Acta Optica Sinica, 2018, 38(9): 0934001.